Yamaha DTXpress/DTXplorer/DTXtreme

Hi, I posted a message yesterday about a used dxtpress 2 vs a new 3. 
Well, I bought the used model last night and was told its a 2. But, I 
think its an original. I do not see anything on the unit that says 2. I 
think i was duped. My guess is that a used original model for $650 is a 
waste of money, and I will probably return it to guitar center. Can 
anyone confirm or refute my guess. Also, sorry for wasting email 
time..i searched the message board and cant seem to efficiently find my 
answer. Also, there is no good website out there besides this group. 
So, thanks. This group is extremely helpful.
Garrey